Mechanism for preventing side slipping of pneumatic-tired wheels.



PATENTED APR. 4, 1905.

A. J. GROSSMANN. MECHANISM FOR PREVENTING SIDE SLIPPING OP PNEUMATICTIRED WHEELS.

No. 786,494. I

APPLICATION FILED MAR. 14, 1904,

UNITED STATES Patented April 4., 1905.

PATENT OFFICE.

MECHANISM FOR PREVENTING SIDE SLIPPING OF PNEUMATIC-TIRED WHEELS.

. SPECIFICATION forming part of Letters Patent No. 786,494, dated April4, 1905.

Application filed March 14, 1904. Serial No. 198,083.

To all whom, it ntay concern.-

Be it known that I, ALEXANDER JAMES GRossMANN. residing at 47 Artesianroad, Bayswater, London, in the county of Middlesex, England, haveinvented certain new and useful Improvements in Mechanism to PreventWheel Side Slipping of Motor Cars and Oycles or any Pneumatic-TireVehicles; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention consists in improved mechanism to prevent wheel sideslipping of motor cars and cycles or any pneumatic-tire vehicles. Itsconstruction and operation will be readily understood by reference tothe drawings, in which- Figure 1 is a side elevation showing carwheeland arrangement-of plates and push rods or staves. Fig. 2 is a frontView of the car-wheel, partly in section, showing position of cone andpush rods or staves when the segmental plates are in use. Fig. 3 showsdetail of lever and taper fork for actuating the cone and push-rod andthe position of plates when out of action. Fig. 4c is a side View offorks and lever operating same. Fig. 5 is an enlarged view of groovedperiphery of segment. Fig. 6 is an enlarged detail of segment, showingarrangement for securing spring to the stave.

In the drawings, (0 represents a wooden or metallic car-wheel upon whichis mounted a pneumatic tire b.-

0 is the coned or recessed hub, which may be formed of wood hooped inthe usual manner, or it may be wholly formed of metal and fitted withpitch-chain or other form of driving-wheel (Z. A series of holes 0 areformed in the hub or nave .0 of the wheel. I provide a series of rods orstaves g, the inner ends of which project through the holes 0, formed inthe hubs. The outer ends of these staves are of a T or segmental shapeand overlap at the joints, as at 11,. Slots 2' are formed in the outerends of these segments,and through these slots pass studs, bolts, or thelike j, which are screwed, bolted, or riveted into the wooden felly ormetallic rim 7a of the wheel a. To

to the axle 0.

keep the staves of the segmental pieces in the inward position withinthe holes formed in the hub, I employ springs Z. These are held inposition by and preferably fastened to metallic shoes m, secured to thespokes, the base of each spring abutting against the felly of the wheelor rim is. The periphery of these I segments is preferably grooved orroughened, as at a, (see also enlarged view, Fig. 6,) so as to makebetter contact with the road when in operation, one or more of thegrooves being preferably larger than the rest to admit of a suitablepacking being inserted, if required.

0 is the axle of the car. Aconed or beveled push-piece p is bored andpreferably slotted, as at q, so as to slide backward and forward freelyupon a key 0-, sunk in the turned axle 0. When out of action, theperiphery of the expanding segmental plates is well within the diameterof the tire of the wheel. (See Fig. 3.) When, however,the conedpush-piece is forced inward, (see Fig. 2,)its coned or tapered portionengages with the inner ends of the rods or staves c forcing them outwardagainst the action of the springs Z, and so causing the periphery of thesegments to project flush with or slightly beyond the tire 5, therebygripping the road and avoiding all possibility of side slip. The meanswhereby I operate these push-pieces is as follows: I provide twoL-shaped lugs or brackets e, which are secured in any convenient manner,as by set-screws or the like w, To the longer or horizontal arms :0 Ipivot, by means of bolts, rivets, or the like f two plates the oppositeends of which are rigidly secured by a cross-bar .2, to which the rod,chain, lever, or other device I, employed for fastening down the lever,is fastened. At a suitable point upon the plates y are securedoutwardly-tapering horns or yokes 2. Each of these horns, when adownward pull is exerted upon the cross-bar .2 by the rod, chain, lever,or the like I, engage with the push-piece p, forcing them inward bytheir wedging action upon the outside of the brackets o. (See Fig. 2.)To prevent any tendency to jamb and impart a certain amount ofelasticity to the push-pieces, I fasten a leaf-spring 3 upon each of theshorter arms 4 on the L-shaped brackets o.

In Fig. 6 is shown one of the form of grooves a that 1 may employ forgiving a better grip to the periphery of the segments. The centralgroove may be of any convenient depth, fitted with a fibrous substance15, if required, and to keep this in position I may employ bolts orscrews 7', as shown.

WhatI claim as my invention, and desire to secure by Letters Patent, is

1. The combination with a vehicle fitted with pneumatic tires of theimproved skid, consisting of overlapping T-shaped or segmental plates,secured by bolts, set-screws, rivets or the like passing throughslot-holes formed in the segments into the felly, rim or spokes of thewheel, the stavcs or rods forming the inner or central part of saidsegments, passing through holes in the hub and the cone or push piece orpieces operated by the wedgeshaped horns for forcing outward the rodsand segments and enabling the same to be withdrawn by the action of thesprings in the manner shown.

2. In combination with a wheel, a skid consistingof outwardly-movablesegmental parts, a conical push-piece adapted to engage the innersurfaces of said segmental parts and force them outward so that theperiphery of the said skid projects beyond the periphery of the saidwheel to prevent its lateral slip, and a device acting transverselyagainst the said conical push-piece to force it against said innersurfaces, substantially as set forth.

3. In combination witha wheel, and a radially-expansible sectional skid,for preventing its lateral slip, apush-piece arranged to force the partsof the said skid outward and springs arranged to impart elasticity, tothe said pushpiece substantially as set forth.

4. The combination with a segmental skid operated by meansof-push-pieces splined upon the axle of the plates pivoted to thehorizontal arms secured to said axle, the horns fastened t0 the pivotedplates and the cross-bar to which the actuating-lever is attached.

5. In combination with a wheel, askid consisting of radially-expansiblesegmental parts, a push-piece directly engaging them to force them outbeyond the periphery of the said wheel in order to prevent its lateralslip and a part having an inclined face movable transversely in contactwith the rear of the pushpiece, substantially as and for the purpose setforth.

6. In combination with a wheel, a skid consisting of radially-expansiblesegmental parts, a conical push-piece adapted to engage the said partsand a wedge-shaped horn or yoke which forces the push-piece intooperative engagement with the said segmental parts substantially as setforth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

ALEXANDER JAMES GROSSMANN.

Witnesses:

H. D. JAMESON, A. NU'LTING.

